VIPER100SP datasheet(16/23 Pages) STMICROELECTRONICS

No de pièce	VIPer100SP

Description	SMPS PRIMARY I.C.

PDF	23 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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16 / 23 page

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VIPer100/SP - VIPer100A/ASP

Figure 22: Input Voltage Surges Protection

ELECTRICAL OVER STRESS RUGGEDNESS

The VIPer may be submitted to electrical over

stress caused by violent input voltage surges or

lightning.

Following

the

enclosed

Layout

Considerations chapter rules is the most of the

time sufficient to prevent catastrophic damages,

however in some cases the voltage surges

coupled through the transformer auxiliary winding

can overpass the VDD pin absolute maximum

rating voltage value. Such events may trigger the

VDD internal protection circuitry which could be

damaged by the strong discharge current of the

VDD bulk capacitor. The simple RC filter shown in

figure 22 can be implemented to improve the

application immunity to such surges.

Bulk capacitor

(Optional)

22nF

Auxilliary winding

13V

OSC

COMP SOURCE

DRAIN

VDD

VIPerXX0

39R

VIPer100SP Fiches technique(PDF) 16 Page - STMicroelectronics